The DTA-0540-60-8-OPT0510 from Quantic PMI (Planar Monolithics) is a RF Variable Attenuator with Frequency 500 MHz to 1 GHz, Attenuation Range 60 dB, Attenuation Step 0.25 dB, Power 2 W, P1dB 33.01 dBm. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for DTA-0540-60-8-OPT0510 can be seen below.